Volume 14 Issue 2
Mar.  2021
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Chinese Optics  > 2021  >  14(2): 336-343.
YU Dan, SUN Yan, FENG Zhi-shu, DAI Yu-yin, CHEN An-min, JIN Ming-xing. Effects of the combination of sample temperature and spatial confinement on laser-induced breakdown spectroscopy[J]. Chinese Optics, 2021, 14(2): 336-343. doi: 10.37188/CO.2020-0118
Citation: YU Dan, SUN Yan, FENG Zhi-shu, DAI Yu-yin, CHEN An-min, JIN Ming-xing. Effects of the combination of sample temperature and spatial confinement on laser-induced breakdown spectroscopy[J]. Chinese Optics, 2021, 14(2): 336-343. doi: 10.37188/CO.2020-0118
shu

Effects of the combination of sample temperature and spatial confinement on laser-induced breakdown spectroscopy

  • 1.

    Basic Aviation College, Air Force Aviation University, Changchun 130022, China

  • 2.

    Aviation Operations Service College, Air Force Aviation University, Changchun 130022, China

  • 3.

    Nuclear Medicine Department, The First Hospital of Jilin University, Changchun 130021, China

  • 4.

    Institute of Atomic and Molecular Physics, Jilin University, Changchun 130012, China

Funds:  Supported by National Natural Science Foundation of China (No. 11674128, No. 11674124, No. 11974138); the Thirteenth Five-Year Scientific and Technological Research Project of the Education Department of Jilin Province (No. JJKH20200937KJ)
More Information
  • Corresponding author: mxjin@jlu.edu.cn
  • Received Date: 07 Jul 2020
  • Rev Recd Date: 12 Aug 2020
    • Available Online: 05 Feb 2021
  • Publish Date: 23 Mar 2021
    Abstract
  • The signal intensity of Laser-Induced Breakdown Spectroscopy (LIBS) can be improved by increasing sample temperature and confining space confinement. The combination of the two techniques can further improve the spectral intensity of LIBS. In this paper, the effects of increasing a sample’s temperature and spatial confinement on LIBS are studied in air, and the time-resolved spectra of laser-induced aluminum plasma are measured. The experimental results show that increasing the sample’s temperature can increase the signal intensity of LIBS since a sample with a higher temperature can absorb more laser energy; when the cylindrical cavity is used to confine the plasma, the spectral emission is further improved. The effect of the combination of the two experimental conditions is that the signal intensity of LIBS is significantly stronger than that of either condition alone. The intensity of Al (I) 396.2 nm increases to 1.4 times at 200 °C with higher temperature conditions alone, 1.3 times when spatial confinement is applied alone, and 2.1 times at 200 °C with spatial confinement. The emission intensity with the combined effects is higher than the sum of that under the two individual conditions. The effect of the combination is mainly based on the fact that laser irradiation of the sample under a higher temperature generates stronger shock waves that can more effectively compress a larger-sized plasma plume, thereby further improving the spectral intensity of LIBS.

     

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